Sql双表查询最重复的外键

我有两张桌子，运动桌和学生桌：

第一桌运动：

第二桌学生：

到目前为止，我做了这项工作，它输出的数字大部分是插入的，但无法让它工作 有两张桌子

SELECT  sport_idsport 
FROM (SELECT sport_idsport FROM student GROUP BY sport_idsport ORDER BY COUNT(*) desc)  
WHERE ROWNUM<=1;

我需要输出最流行的运动的名称，在这种情况下，它将是滑冰

我使用oraclesql

select cnt, sport_idsport from (
  select count(*) cnt, sport_idsport
    from student
   group by sport_idsport
   order by count(*) desc
)
where rownum = 1

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SQLFiddle示例：

您一定试过什么。请编辑问题并展示你的努力。为什么答案是溜冰？登机也很受欢迎，都是两次选的我的错是赶时间

SELECT  sport_idsport 
FROM (SELECT sport_idsport FROM student GROUP BY sport_idsport ORDER BY COUNT(*) desc)  
WHERE ROWNUM<=1;

select cnt, sport_idsport from (
  select count(*) cnt, sport_idsport
    from student
   group by sport_idsport
   order by count(*) desc
)
where rownum = 1

with counter as (
    Select sport_idsport, 
           count(*) as cnt,
           dense_rank() over (order by count(*) desc) as rn
    from student 
    group by sport_idsport
)
select s.*, c.cnt
from sport s
 join counter c on c.sport_idsport = s.idsport and c.rn = 1;